title: Details of the ultrafast DNA photo-cross-linking reaction of 3-cyanovinylcarbazole nucleoside: cis-trans isomeric effect and the application for SNP-based genotyping.
abstract: To clarify the cis-trans isomeric effect on the ultrafast DNA photo-cross-linking reaction of 3-cyanovinylcarbazole nucleoside ((CNV)K) in the DNA duplex, which gives a single photodimer on the reversed-phase HPLC chromatogram, the kinetics of the cis-trans photoisomerization of (CNV)K in double-stranded DNA was evaluated. Since the photoisomerization rate constant for cis to trans isomerization in double-stranded DNA was significantly larger than that for trans to cis isomerization, and the thermodynamic stability of the trans isomer was higher than that of the cis isomer, it was strongly suggested that the trans isomer of (CNV)K is a reactive species of the photo-cross-linking reaction. (1)H-(1)H NOESY analysis of the photoadduct consisting of (CNV)K and T also supported the trans-mediated photo-cross-linking reaction of (CNV)K. By using this ultrafast photo-cross-linking reaction for the molecular beacon-based SNPs typing, four individual Japanese rice strains were clearly distinguishable with simple photoirradiation and fluorescence imaging using double-stranded target DNAs.
authors.affiliation: School of Materials Science and ‡Research Center for Bio-Architecture, Japan Advanced Institute of Science and Technology , 1-1 Asahi-dai, Nomi, Ishikawa 923-1292, Japan.
authors.forename: Kenzo
authors.initials: K
authors.lastname: Fujimoto
authors.forename: Asuka
authors.initials: A
authors.lastname: Yamada
authors.forename: Yoshinaga
authors.initials: Y
authors.lastname: Yoshimura
authors.forename: Tadashi
authors.initials: T
authors.lastname: Tsukaguchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Sakamoto
mesh_terms: D002227:Carbazoles / Q000737:chemistry*; D003432:Cross-Linking Reagents / Q000737:chemistry*; D004247:DNA / Q000737:chemistry* / Q000235:genetics*; D005838:Genotype; D007202:Indicators and Reagents; D008958:Models, Molecular; D009705:Nucleosides / Q000737:chemistry*; D020641:Polymorphism, Single Nucleotide; D013237:Stereoisomerism; D013816:Thermodynamics
chemical_list: D002227:Carbazoles; D003432:Cross-Linking Reagents; D007202:Indicators and Reagents; D009705:Nucleosides; D004247:DNA